Base station



FIG. 1 is right perspective view of my new design;

FIG. 2 is front elevation view thereof;

FIG. 3 is right side elevation view thereof;

FIG. 4 is left side elevation view thereof;

FIG. 5 is top elevation view thereof; and,

FIG. 6 is bottom elevation view thereof.

The rear is not considered to be a part of my claimed design. 

The ornamental design for base station, as shown and described. 